Why we love this..Can be used with all Vacu Vin's Wine Saver Pumps. Universal fit for all wine bottles. Set of 2 wine stoppers preserve your favorite wines. Designed to be used with all of Vacu Vin's Wine Saver Pumps (sold separately). Just insert the universal wine saver vacuum stoppers into the bottle and pump using a genuine Vacu Vin Wine Saver Pump (sold separately). Universal fit for all wine bottles. Plastic. Hand wash. Measures 3.6" L x 4" W x 1.6" H each. Imported.